Lead leg round-house

Ok so I am going to ask a really stupid question so I figured this was the best forum to get flak for it. So here it goes, is there any point at all to a lead leg round-house?? I know personally I completely ignore them when sparring, and it just seems to me that the time it takes to practice it would be better spent practicing a kick that has power. But maybe someone here with more experience than me (shouldn't be that hard to find) can explain the point of that kick.

I respect this kick because one of my old training partners landed one of those to my jaw as I stepped in to punch, and the next thing I remember I was on the ground looking at the ceiling, with the group standing in a circle around me. Apparently my back hand had drifted down to my shoulder level so his kick landed cleanly. The lead roundhouse necessarily involves shifting all your weight to the back foot, so it can be used to hit someone as you're making them miss, because your head will be shifting back from its current location. This can also be used as a body kick that can hit the body at the moment when the elbows aren't protecting the midsection (that is to say, when the hand is extending out to punch). Are they super knockout blows? No, but I don't see why you should naysay them on those grounds- the high percentage arsenal isn't all power shots.

Also, it can be made into a more powerful kick by using it as a followup to the cross (especially as a low kick if they cover their head) because the hip will be coiled from the punch and the weight will be shifted too, so you can shift and rotate all the way to the other side for a solid kick.

My element of surprise call works here. Work the low lead leg round house a couple of times, opponent comes to expect it, BAM, high kick, he's concentrating on blocking low, opponent is KO'd. You're welcome.

I typed up a big long thing, but then accidentally refreshed the page. Here's the short version:
-Liver kicks to the body, which totally hurt
-Inside leg kicks, which can easily turn into a feint for a lead roundhouse or hook kick to the head, or be followed up with a coup de pied bas/oblique kick from the back foot
-Outside leg kicks against southpaws, which are extremely difficult to block and can be landed in great volume

The fool thinks himself immortal,
If he hold back from battle;
But old age will grant him no truce,
Even if spears spare him.